Driving organic thin-film EL display by first zero biasing by short circuiting all pixels and then forward biasing selected pixels and reverse biasing nonselected pixels to prevent crosstalk

Abstract

When a forward bias is applied between a selected unit electrode of scanning electrodes and a selected unit electrode of data electrodes to cause a selected pixel concerning both of the selected unit electrodes to emit light, and a reverse bias is applied between nonselected unit electrodes of the scanning electrodes and nonselected unit electrodes of the data electrodes, thereby preventing crosstalk caused by a semi-excited state of the nonselected pixels, all of the scanning electrodes and all of the data electrodes are short-circuited once, immediately before a predetermined unit electrode of the data electrode, which should be selected in accordance with selection of each of the unit electrodes of the scanning electrodes, is selected, to set all of the pixels at a zero bias.

What is claimed is:  
     
       1. A method of driving an organic thin-film EL display device in which one or a plurality of organic multilayered thin films including at least one organic emission thin film are clamped in a matrix between a plurality of scanning electrodes comprising unit electrodes and a plurality of data electrodes comprising unit electrodes, at least one of said scanning electrodes and said data electrodes being translucent, wherein when a forward bias is applied between a selected unit electrode of said scanning electrodes and a selected unit electrode of said data electrodes to cause a selected pixel concerning both of said selected unit electrodes to emit light, and a reverse bias is applied between nonselected unit electrodes of said scanning electrodes and nonselected unit electrodes of said data electrodes, thereby preventing crosstalk caused by a semi-excited state of said nonselected pixels, all of said scanning electrodes and all of said data electrodes are short-circuited once, immediately before a predetermined unit electrode of said data electrode, which should be selected in accordance with selection of each of said unit electrodes of said scanning electrodes, is selected, to set all of said pixels at a zero bias. 
     
     
       2. A method of driving an organic thin-film EL display device in which one or a plurality of organic multilayered thin films including at least one organic emission thin film are clamped in a matrix between a plurality of unit electrodes comprising unit electrodes and a plurality of data electrodes comprising scanning electrodes, at least one of said scanning electrodes and said data electrodes being translucent, wherein when a forward bias is applied between a selected unit electrode of said scanning electrodes and a selected unit electrode of said data electrodes to cause a selected pixel concerning both of said selected unit electrodes to emit light, and a reverse bias is applied between nonselected unit electrodes of said scanning electrodes and nonselected unit electrodes of said data electrodes, thereby preventing crosstalk caused by a semi-excited state of said nonselected pixels, all of said scanning electrodes and a predetermined unit electrode of said data electrodes are short-circuited once, immediately before said predetermined unit electrode of said data electrode, which should be selected in accordance with selection of each of said unit electrodes of said scanning electrodes, is selected, to set pixels concerning all of said scanning electrodes and said predetermined unit electrode of said data electrodes at a zero bias. 
     
     
       3. An organic thin-film EL display device drive circuit for driving an organic thin-film EL display device in which one or a plurality of organic multilayered thin films including at least one organic emission thin film are clamped in a matrix between a plurality of scanning electrodes comprising unit electrodes and a plurality of data electrodes comprising unit electrodes, at least one of said scanning electrodes and said data electrodes being translucent, wherein when a forward bias is applied between a selected unit electrode of said scanning electrodes and a selected unit electrode of said data electrodes to cause a selected pixel concerning both of said selected unit electrodes to emit light, and a reverse bias is applied between nonselected unit electrodes of said scanning electrodes and nonselected unit electrodes of said data electrodes, thereby preventing crosstalk caused by a semi-excited state of said nonselected pixels, all of said scanning electrodes and all of said data electrodes are short-circuited once, immediately before a predetermined unit electrode of said data electrode, which should be selected in accordance with selection of each of said unit electrodes of said scanning electrodes, is selected, to set all of said pixels at a zero bias. 
     
     
       4. An organic thin-film EL display device drive circuit for driving an organic thin-film EL display device in which one or a plurality of organic multilayered thin films including at least one organic emission thin film are clamped in a matrix between a plurality of scanning electrodes comprising unit electrodes and a plurality of data electrodes comprising unit electrodes, at least one of said scanning electrodes and said data electrodes being translucent, wherein when a forward bias is applied between a selected unit electrode of said scanning electrodes and a selected unit electrode of said data electrodes to cause a selected pixel concerning both of said selected unit electrodes to emit light, and a reverse bias is applied between nonselected unit electrodes of said scanning electrodes and nonselected unit electrodes of said data electrodes, thereby preventing crosstalk caused by a semi-excited state of said nonselected pixels, all of said scanning electrodes and a predetermined unit electrode of said data electrodes are short-circuited once, immediately before said predetermined unit electrode of said data electrode, which should be selected in accordance with selection of each of said unit electrodes of said scanning electrodes, is selected, to set pixels concerning all of said scanning electrodes and said predetermined unit electrode of said data electrodes at a zero bias.